Body Gear Doors - Component Location (Details from Sht 1)
Figure 102 (Sheet 2)

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A
747-400 MAINTENANCE MANUAL
 BODY GEAR DOORS - ADJUSTMENT/TEST
_________________________________
 1.  General_______
 A.  This procedure has two tasks:
 (1)  
The adjustment of the doors for the body landing gear.

 (2)  
The adjustment of the doors for the body landing gear after the door actuator replacement.

 B.  
When you replace the door for the body landing gear, you must adjust the door. It is necessary to close the door to check the actuator for the fully locked position or for rig pin installation of the sequence valve. If the actuator cannot be locked fully or the rig pin cannot be put in freely, you must adjust the door.

 C.  
When you close the doors, make sure the landing gear control handle is in the off position. This will port the hydraulic pressure in the door actuator to return and ensure the door is mechanically locked.

 D.  
You can adjust the forward doors for the body landing gear with the airplane on the ground. You must lift the airplane clear of the ground to adjust the shock strut door. If you do not have jacks, you can do a alternative door adjustment with the steps that follow.

 E.  
This task is applicable to the left body landing gear doors and the right body landing gear doors.

 TASK 32-14-00-825-277
 2.  Adjustment - Body Gear Doors____________________________
 A.  General
 (1)  
The adjustment of the doors is necessary if a door is out of the contour or after the door replacement.

 (2)  
The door preload is necessary to keep the door contour and the aerodynamic smoothness during flight. It is given in each adjustment where it is applicable.

 (3)  
An alternative adjustment for the shock strut doors is given. (See step for Alternative Door Adjustment For The Shock Strut (Airplane not lifted). You can use the alternative adjustment when it is not possible to lift the airplane, and when the exact length of the inboard and outboard linkage rods and the positions of the stop pads are known.

 (4)  
Throughout the adjustment, use the safety precautions to prevent person injury from the accidental gear operation or door opening or closing.

 B.  
Special Tools and Equipment

 (1)  
G12001-4 Rigging Pins, BD-1 and BD-2, 0.1885
 (+0.003/-0.000) inch

 C.  
References

 (1)  
AMM 07-11-01/201, Jacking Airplane

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747-400
MAINTENANCE MANUAL

 (2)  
AMM 09-11-00/201, Towing

 (3)  
AMM 29-11-00/201, Main Hydraulic Supply System

 (4)  
AMM 32-00-30/201, Landing Gear Door Locks

 (5)  
IPC 32-14-01 Fig. 1, IPC 32-14-02 Fig. 2, IPC 32-14-05,
 IPC 32-14-06 Fig. 1

 D.
Access

 (1)  
Location Zone
 751 Body Landing Gear Door, Aft Inboard, LH
 761 Body Landing Gear Door, Aft Inboard, RH
 752 Body Landing Gear Door, Aft Outboard, LH
 762 Body Landing Gear Door, Aft Outboard, RH
 753 Body Landing Gear Door, Forward Inboard, LH
 763 Body Landing Gear Door, Forward Inboard, RH
 754 Body Landing Gear Door, Aft Outboard, LH
 764 Body Landing Gear Door, Aft Outboard, RH

 E.
Preconditions

 S 865-284
 (1)  
These conditions are necessary for this task:

 (a)  
The airplane is on jacks (AMM 07-11-01/201).

 NOTE: This task includes an alternative procedure you can use
____ if you do not have jacks. You can use it only if you know the exact length of the inboard and outboard linkage rods, and if you know the positions of the stop pads.
　
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